Lead AI Engineer - Production ML & LLM Innovation

Mendo; Paris; On-site; EUR 90,000 - 120,000; Full time

Job summary

JobTailor is seeking an experienced ML/AI engineer to own end-to-end AI features for our products in Paris. You will lead applied AI research, turning it into shippable capabilities and optimizing evaluation harnesses to ensure models remain reliable.

Ideal candidates have 6+ years of production ML/AI experience, strong LLM tuning skills, and a track record of delivering cost- and latency-aware AI systems.

Qualifications

• 6+ years of ML/AI engineering experience with production models and features.
• Strong expertise in LLM fine-tuning, RAG, embeddings, and evaluation methods.
• Production-ready AI systems optimization for cost, latency, and quality.
• Strong software engineering fundamentals and operational mindset.
• Proficient in Python; comfortable with a TypeScript codebase.
• Experience with small language models and on-prem deployment is a plus.

Responsibilities

• Own AI research and end-to-end features for products.
• Lead applied AI research and translate findings into shipped features.
• Build evaluation harnesses (golden sets, regression tests) to protect AI quality.
• Develop the AI behind usage analytics and AI-driven customer recommendations.

Skills

ML engineering

AI engineering

LLM fine-tuning

RAG

embeddings

evaluation

regression testing

Python

TypeScript

small language models

Job description

JobTailor is seeking an experienced ML/AI engineer to own end-to-end AI features for our products in Paris. You will lead applied AI research, turning it into shippable capabilities and optimizing evaluation harnesses to ensure models remain reliable.

Ideal candidates have 6+ years of production ML/AI experience, strong LLM tuning skills, and a track record of delivering cost- and latency-aware AI systems.